Impulse GeneratorsCable Fault Locators

n Maintenance-free operation

n Engineered to assure optimum operatorsafety

n Heavy-Duty model delivers up to 10,800Joules — the highest impulse in theindustry

n Simple to use, even for the infrequentoperator

Impulse GeneratorsCable Fault Locators

DESCRIPTIONImpulse generators are designed to locate faults in powercable by the high voltage impulse method, in which ahigh-voltage impulse is transmitted down the cable tocause the fault to arc. The arcing fault is then pinpointedusing an appropriate impulse detector.

Megger impulse generators may also be used to performvoltage versus time acceptance tests, or to burn faults thatfail to break down under impulse to reduce theirresistance. Megger offers three models to meet yourapplication:

15-kV Portable Model — This 75-lb (34 kg) portable unitdelivers 536 Joules for pinpointing faults on most primarydistribution cable rated to 15 kV.

Dual-Voltage Model — This 80-lb (36kg) constant energyunit permits up to 450 Joules to be discharged over boththe 7.5 and 15 kV ranges of the unit.

Heavy-Duty Model — This powerful unit, designed for vanor substation use, offers the highest impulse rating in theindustry. It delivers up to 5400 Joules at 30 kV (12 µF). A 24 µF option is available which delivers up to 10,800Joules at 30 kv.

APPLICATIONSMegger impulse generators pinpoint faults on primarydistribution cable rated from 3.3 to 35 kV, includingdirected buried cable and cable in conduit or duct.

For faults that do not break down in the impulse mode, aburn mode is provided to reduce the resistance so thatthose faults will break down under impulse voltage.

In addition to fault locating, these units can be used asproof testers to check the quality of insulation before andafter cable repair.

FEATURES AND BENEFITSImpulse generators offer specific benefits that ensureefficient, effective and safe fault locating.

Rugged Constructionn Housed in sturdy metal cabinets using welded

construction throughout to withstand the rigors of fieldoperation.

n Impulse switches use tungsten ohmic contacts forextended life.

Simple Operationn Modular control panels with a minimum of controls and

instrumentation reduce operation complexity.

n Single lever operation mode selector eliminates the needto disconnect and manually interchange high voltageoutput cables.

n High voltage and return leads are combined in onecoaxial cable eliminating the need to unravel the totallength of test cable during operation.

Impulse GeneratorsCable Fault Locators

Standard Safety Featuresn Isolated high voltage output cable

n Zero-start voltage interlock

n High voltage ON lamp

n Automatic grounding upon shutdown

n Redundant ground connections

n Manual grounding of capacitor and cable by ModeSelector for safety.

n Viewing window to confirm internal grounding system

n Circuit breakers for overload protection

n External interlock provision

n Meters remain active even when power is off

Continuous Voltage Controln Allows full adjustment of output voltage over the

impulse and proof/burn range

n Limits the output voltage to the minimum necessary forbreakdown

Maintenance-Free Operationn Quality components and construction assure ongoing

reliable operation

15-kV Portable Model (Catalog #651017)For lightweight economy, this 75-lb(34-kg) instrument discharges 563Joules at 15 kV.

Specific capabilities include:n It will locate all faults on 15-kV

class direct buried cable.

n Its 25-kV/30mA burn mode ishandy for simple breakdowntesting and fault resistancereduction on cables up to 15 kV.

Dual-Voltage Model (Catalog #651016)For power without pounds, thislightweight constant energy unitfeatures dual voltages to permitup to 450 Joules to be dischargedover both a 7.5 and 15 kV range.On the 7.5 kV range this unitutilizes a 16 µF capacitor whichproduces an extremely loud“thump” at the fault.

This model is designed primarilyfor direct buried cable inapplications that requireinstrument transport without atruck or van.

Specific capabilities include:n On the 7.5 kV range, it can be used on 5 kV class cable

without a reduction in signal energy.

n On the 15 kV range, it is sufficiently powerful to locatefaults on 15 kV class direct buried cable.

n The 25 kV proof mode permits maintenance testing of 5 kV class cable.

n The 25 kV/30 mA burn mode permits simple breakdowntesting and fault resistance reduction to locate faults on 15 kV class cable.

Heavy-Duty Model (Catalog #653031)This model offers the highestimpulse rating in the industry.When using the optional 12 µFreserve capacitor, it can deliver adischarge of 10,800 Joules at 30kV intermittently. This optionproduces a louder “thump” at thefault site resulting in locatingsuccess at lower voltages.

This model features skids forstandard mounting in a van,trailer or truck, and can beoptionally caster-mounted forstation use.

This unit is designed for heavy-duty applications such as complex network circuits andfaults located in pockets of water and oil. It will findvirtually all the faults in primary distribution cable.

Specific capabilities include:n With its 3750 or 7500 Joule at 25 kV impulse voltage

output, it can find faults on 35 kV class direct buriedcable or in conduit or duct.

n The 65 kV proof mode permits acceptance testing of 15kV class cable and maintenance testing of 25 kV classcable.

n The 65 kV/100 mA burn mode permits simplebreakdown testing and fault resistance reduction tolocate faults on 35 kV class cable.

This unit offers the following power output capabilities:n It delivers 3750 Joules with 12 µF at 25 kV every 5

seconds, with an overrange that permits a maximumdischarge of 5400 Joules at 30 kV intermittently.

n Optionally, it delivers 7500 Joules with 24 µF at 25 kVevery 10 seconds, with an overrange that permits amaximum discharge of 10,800 Joules at 30 kVintermittently.

15-kV Portable Model, Cat. No. 651017

Dual-voltage Model, Cat. No. 651016

Heavy-duty model, Cat. No. 653031

Cable Length

Model Output Ground Input

15-kV Portable 25 ft (7.6 m) 15 ft (4.5 m) 15 ft (4.5 m)and Dual-Voltage

Heavy-Duty 150 ft (45.6 m) 50 ft (15.2 m) 25 ft (7.6 m)

Impulse GeneratorsCable Fault Locators

SPECIFICATIONS

Input Power

15-kV Portable Model (Cat. No. 651017) Nominal 120 Vac, 4.5 A, 1-φ, 60 Hz onlyTo order instrument with input other than noted above, add one of the following to the Cat. No.:-45 Nominal 220 V ac, 50 Hz-47 Nominal 240 V ac, 50 Hz

Dual-Voltage Model (Cat. No. 651016) Nominal 120 Vac, 4.5 A, 1-φ, 50/60 HzTo order instrument with input other than noted above, add the following to the Cat. No.:-47 Nominal 240 V ac, 50/60 Hz

Heavy-Duty Model (Cat. No. 653031) Nominal 120 Vac, 25 A, 3 kVA, 60 Hz.To order instrument with input other than noted above, add one of the following to Cat. No.:-01 Nominal 240 Vac, 60 Hz-02 Nominal 120 Vac, 50 Hz-03 Nominal 240 Vac, 50 Hz

Cables SuppliedOne permanently connected shielded output cable for coaxialhigh voltage and return leads; one ground cable, and onepermanently connected input cord. Lengths shown below.

Dimensions

15-kV Portable Model27 L x 13.5 W x 13.5 H in. (690 L x 343 W x 343 W mm)

Dual-Voltage Model13.5 L x 13.5 W x 24 H in. (243 L x 343 W x 610 W mm)

Heavy-Duty Model36 L x 24 W x 40 H in. (914 L x 610 W x 1016 H mm)

Environmental

TemperatureOperating: 14 to 113° F (-10 to +45° C)Storage: -22 to +131° F (-30 to +55° C)

Elevation7500 ft (2286 m) maximum. Derate voltage at higher altitudes.

Humidity5 to 95% RH noncondensing.

ClimateOperation in direct rain or snow is prohibited.

Max. Stored Storage Impulse Model Cat. No. Energy Capacitance Interval Impulse Proof Test Burn Current Weight

15-kV 651017 563 Joules 5 µF Variable 0 to 15 kV 0 to 25 kV 0 to 30 mA 75 lbPortable 1 to 5 s (34 kg)

Dual-Voltage 651016 450 Joules 16 µF 8 s 0 to 7.5 kV 0 to 25 kV 0 to 30 mA 80 lb7.5 kV & 15 kV 4 µF (36 kg)

653031 3750 Joules 12 µF 5 s @ 60 Hz 0 to 25 kV 0 to 65 kV 0 to 100 mA 750 lb

Heavy-Duty 5400 Joules* 12 µF 6 s @ 50 Hz 0 to 30 kV (340 kg)

653031-32 7500 Joules 24 µF 10 s @ 60 Hz 0 to 25 kV 0 to 65 kV 0 to 100 mA 770 lb10,800 Joules* 24 µF 12 s @ 50 Hz 0 to 30 kV (349 kg)

*Intermittent

Output Ranges

Electromagnetic Impulse DetectorThe Electromagnetic Impulse Detector has been designedto localize faults on buried cable by detecting themagnitude and polarity of current established on a cableduring surging with a surge generator.

The instrument iscomposed of anamplifier module,sheath coil, andcarrying case. It istypically used onnetwork systems toisolate a faultbetween manholes. An optional earth frame and surfacecoil are available.

The Electromagnetic Impulse Detector can be used with PFL Systems or with surge generators of othermanufacturers.

If an integrated fault locating system is required which willprovide the pre-location capabilities of arc reflection orsurge pulse reflection methods, consider one of theMegger Power Cable Fault Locating Systems. Any of thePFL series can be supplied complete with a DART® CableAnalysis System integrating a total fault locating systeminto one package.

UK Archcliffe Road, DoverCT17 9EN England T (0) 1 304 502101 F (0) 1 304 207342

UNITED STATES 4271 Bronze WayDallas, TX 75237-1019 USAT 1 800 723 2861 T 1 214 333 3201 F 1 214 331 7399

OTHER TECHNICAL SALES OFFICESNorristown USA, Toronto CANADA,Mumbai INDIA, Trappes FRANCE, Sydney AUSTRALIA, Madrid SPAINand The Kingdom of BAHRAIN.\\\\

ISO STATEMENT

Registered to ISO 9001:2000 Reg no. Q 09250

Registered to ISO 14001 Reg no. EMS 61597

IMPULSEGENERATOR_DS_en_V02www.megger.comMegger is a registered trademark

Impulse GeneratorsCable Fault Locators

Item (Qty) Cat. No.

15-kV Portable Impulse Generator 651017

Dual-Voltage Impulse Generator 651016

Heavy-Duty Impulse Generator 653031

Optional Accessories

For Cat. No. 651016

Folding two-wheel hand truck 650402

For Cat. No. 653031

Caster-mounted with handle Add -04

Vertical control panel Add -08

Adjustable pulse rate timer for repetitions from 2 to 10 seconds Add -16

Additional 12 µF capacitor with adjustable timer for obtaining 25 kV output with 24 µF of capacitance Add -32

Digital voltmeter and ammeter Add -48

ORDERING INFORMATION

Megger PinPointerSpecifically designed forservice, industrial and powerutility companies, the MeggerMPP1000 pinpoints faults inshielded and direct buriedprimary cables via a single ordual probe. A single probeMPP can be easily upgraded atany time by purchasing asecond probe. The unit cansuccessfully detect both theelectromagnetic and acousticpulses emitted from an arcingfault when it is surged. It can also be used with anyMegger PFL Power Cable Fault Locating system/surgegenerator or other supplier.

ADDITIONAL EQUIPMENT FOR POWER FAULT LOCATING